Wikipedia
Spektr-RG
Spektr-RG (Russian for Spectrum + Röntgen + Gamma; also called Spectrum-X-Gamma, SRG, SXG) is an international high-energy astrophysics observatory, which is being built under the leadership of the Russian Space Research Institute (IKI). Spektr-RG instrumentation includes 5 telescopes spanning the energy range from the far ultraviolet to the hard X-ray, plus an all-sky monitor. it is planned to launch in Sept 2017.
Development of an early version with the same name was cancelled in 2002. The second Spektr-RG is intended to study interplanetary magnetic field, galaxies, black holes.